STUDY ON THREE-DIMENSIONAL SENSIBLE AND LATENT HEAT TRANSPORT MECHANISM OF SEA BREEZES

– MEASUREMENT USING DOPPLER LIDAR AND HEAT BALANCE ANALYSIS BASED ON THE WRF RESULTS –

Abstract

Clarifying the transport mechanism of sensible and latent heat by sea breezes is important for effectively utilizing the cooling effect of sea breezes in urban space. Firstly, qualitative characteristics of sea breezes were extracted based on Doppler lidar observations. Then, the following results were obtained by sensible and latent heat balance analysis based on WRF results. The region where the negative advection value of sensible heat, i.e. the cooling effect by the sea breezes, and the positive advection value of latent heat, i.e. the effect of increasing humidity by the sea breezes, appeared was progressing inland over time. In addition, the sensible heat supplied by advection and turbulent diffusion was transported vertically upwards to about 800 m above the ground by the effect of strong updraft, which heated the upper atmosphere. Also, latent heat supplied by advection and turbulent diffusion at the natural cover surface flowed out into the upper air and humidified above due to strong vertical upward advection at the sea breeze front.